ANÁLISE PARAMÉTRICA E COMPARATIVA DO CUSTO E ESFORÇOS ENTRE OS MODELOS ESTRUTURAIS LAJE LISA E LAJE MACIÇA

Abstract

The structural designer in civil engineering must choose construction methods that are safe and economical. In the case of slabs, there are several construction methods, such as solid, smooth, lattice slabs, etc. In this sense, this work aims to parametrically compare solid and smooth slabs. Parameterization is done by modifying the size of the spans of the spans of the slab that started with a span of 2.0 m, and increases from 0.5 m to 0.5 m until the span of 6 m. For each span, a flat slab was dimensioned by the direct method, always evaluating the bending moments, arrows, concrete consumption, steel consumption and cost, disregarding the presence of the beams in the massifs and the labor and shapes in the two slabs. For each treatment, types of slabs and spans, the variables bending moments, arrows, concrete consumption, steel consumption and total cost were evaluated. This work was based on Campos (2018) for the study of the solid slab with the exception that the spans were varied in both directions (X and Y). Evidently, the presence of beams, shapes and labor can impact the analysis. However, it is concluded that the massive slabs were considered less flexible and of lower costs as the span increased. In the case of arrows, moments and concrete consumption, the same result was found, that is, they were smaller for massive slabs as the span increased. Attention is drawn to steel consumption, which was smaller for solid slab, but with a smaller difference than the other analyzed parameters. In this way, it is strongly suggested that the presence of beams be evaluated in the massifs, and, thus, verify the true consumption of material.